Soldiers who suffered brain injuries can develop seizures decades — as long as 35 years — after the initial injury, researchers have found. A study published in the journal Neurology found that among a group of 199 Vietnam veterans, about 13 percent developed post-traumatic epilepsy more than 14 years after they had suffered a penetrating head wound, such as a gunshot injury or shrapnel that entered brain tissue. Penetrating head injuries are generally linked with a higher risk for epilepsy than other types of head injuries, such as concussions. more